sekarang gimana eah code programnya...coba dueh liatin yg dibawah ini :
File studikasus.js
<script language="JavaScript" type="text/javascript">
<!--
function hitung(){
var myForm = document.form1;
var x=eval(myForm.x.value);
var y=eval(myForm.y.value);
var pil= myForm.opt.value;
if (pil == "tambah") {
var z = x + y;
}else if (pil == "kurang") {
var z = x - y;
} else if (pil == "kali") {
var z = x * y;
} else if (pil == "bagi") {
var z = x / y;
}
myForm.hasil.value = z;
myForm.x.value = "";
myForm.y.value = "";
}
function resetForm(){
document.form1.reset();
}
</script>
kemudian nie file studikasus.html
<script language="JavaScript" type="text/javascript">
function hitung(){
var myForm = document.form1;
var x=eval(myForm.x.value);
var y=eval(myForm.y.value);
var pil= myForm.opt.value;
if (pil == "tambah") {
var z = x + y;
}else if (pil == "kurang") {
var z = x - y;
} else if (pil == "kali") {
var z = x * y;
} else if (pil == "bagi") {
var z = x / y;
}
myForm.hasil.value = z;
myForm.x.value = "";
myForm.y.value = "";
}
function resetForm(){
document.form1.reset();
}
</script>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
<html>
<head>
<title>Calculator Willys Ala DHtml dan JavaScript</title>
</head>
<body>
<!-- listing code Javascript-->
<form name="form1" action="#">
<input type="text" name="x" />
<select name="opt">
<option value="tambah"> + </option>
<option value="kurang"> - </option>
<option value="kali"> * </option>
<option value="bagi"> / </option>
</select>
<input type="text" name="y" />
<input type="button" value="=" onClick="hitung()" />
<input type="text" name="hasil" disabled="true" /><br/>
<br><input type="button" value="DELETE" onClick="resetForm()" color ="red" /></br>
<body bgcolor="pink">
</form>
</body>
</html>
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